CN103984255A - Analog and digital signal acquisition and interlocking control device - Google Patents
Analog and digital signal acquisition and interlocking control device Download PDFInfo
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- CN103984255A CN103984255A CN201410239047.3A CN201410239047A CN103984255A CN 103984255 A CN103984255 A CN 103984255A CN 201410239047 A CN201410239047 A CN 201410239047A CN 103984255 A CN103984255 A CN 103984255A
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Abstract
The invention discloses an analog and digital signal acquisition and interlocking control device and belongs to the technical field of signal acquisition and control. The analog and digital signal acquisition and interlocking control device is used for solving the problems that an existing analog and digital signal acquisition device can only acquire one type of signals and is single in function. An analog and digital signal acquisition circuit of the analog and digital signal acquisition and interlocking control device provides the capacity for acquiring 32 paths of analog signals, and analog signals output by a peripheral are acquired and transmitted to a digital signal processor after being processed; a digital signal acquisition circuit provides the capacity for acquiring 16 paths of digital signals and used for acquiring digital signals output by the peripheral and transmitting the digital signals to the digital signal processor after processing the digital signals; the digital signal processor judges the current state of the external device and outputs a control signal to a relay unit, and the relay unit has on-off control over the external device through at most eight paths of relays; the digital signal processor simultaneously acquires the state signals of the relays of the relay unit. The device is used for acquiring the analog and digital signals and having interlocking control over the external device.
Description
Technical field
The present invention relates to analog and digital signal collection and chain control device, belong to signals collecting and control technology field.
Background technology
Along with scientific and technical development and the raising of the market demand, collection of simulant signal product and digital signal acquiring product are more and more, and its product quality is also improving constantly.The development of chip technology, all improves constantly the precision of collection of simulant signal and speed, make the capacity of digital signal acquiring also constantly increase, and interference free performance improves constantly simultaneously.But current most of product can only complete a kind of collection of signal, and cannot, in the process of signals collecting, realize switch control according to signals collecting result to relevant device.
Summary of the invention
The present invention seeks to can only complete in order to solve existing analog and digital signal collecting device a kind of collection of signal, the problem of function singleness, provides a kind of analog and digital signal collection and chain control device.
Analog and digital signal collection of the present invention and chain control device, it is for gathering the signal of external unit output, the signal of this external unit output comprises simulating signal and digital signal, it comprises analogue signal acquisition circuit, digital signal acquiring circuit, relay unit and digital signal processor
Analogue signal acquisition circuit provides 32 road collection of simulant signal abilities, for gather the simulating signal of external unit output and it is processed after send digital signal processor to;
Digital signal acquiring circuit provides 16 railway digital signals collecting abilities, for gather the digital signal of external unit output and it is processed after send digital signal processor to;
Digital signal processor judges the current state of external unit according to the signal receiving, and exports control signal to relay unit, and relay unit carries out switch control by maximum No. 8 relays to external unit according to the control signal receiving;
Digital signal processor gathers the relay status signal of relay unit simultaneously.
It also comprises USB interface and host computer,
Host computer carries out the transmission of data and command signal by USB interface and digital signal processor.
Analogue signal acquisition circuit is made up of analog multichannel switch circuit, operational amplifier and A/D convertor circuit,
Analog multichannel switch circuit is for gathering the simulating signal of external unit output and by the leading up to after operational amplifier of multichannel analog signals, switching to A/D convertor circuit, and the digital signal of A/D convertor circuit output sends digital signal processor to.
Digital signal acquiring circuit is made up of photoelectrical coupler and digital signal impact damper,
The digital signal of external unit output, after photoelectric coupler isolation, then sends digital signal processor to through digital signal impact damper.
Relay unit is made up of latch, driver, multicircuit relay and relay status signal buffer,
Multicircuit relay comprises maximum No. 8 relays;
Digital signal processor according to receive signal the current state of external unit is judged, output control signal after latch and driver give multicircuit relay, by multicircuit relay, external unit is carried out to switch control;
Relay status signal buffer is used for receiving the relay status signal of multicircuit relay, and passes to digital signal processor.
Host computer is for completing monitoring and the chain control to external device status by digital signal processor, and the simulating signal and the digital signal that gather are shown to described monitoring and specifically realizing with lower module by host computer of chain control to external device status:
Simulating signal is read in module, digital signal and is read in module, multicircuit relay control module, analog input channel parameter and arrange that module, digital input channel parameter arrange module, chain alarm parameters arranges module and event-monitoring and chain control module,
Simulating signal is read in module for realizing reading of simulating signal to digital signal processor;
Digital signal is read in module for realizing reading of digital signal to digital signal processor;
Multicircuit relay control module, for according to the simulating signal and the digital signal that read, the state of multicircuit relay being controlled, realizes the control to external unit then;
Analog input channel parameter arranges module for realizing the setting to simulating signal input channel parameter;
Digital input channel parameter arranges module for realizing the setting to digital signal input channel parameter;
Chain alarm parameters arranges module for realizing in the time pre-seting chain condition generation, the setting of alarm parameters;
Event-monitoring and chain control module are for realizing the control to outside apparatus output signal and the chain event of relay switch state, it indicates the generation of the chain event fault of external unit by pilot lamp, and obtain current chain event failure code according to the corresponding chain event fault label pre-seting, then determine that according to current chain event failure code the signal of external unit transmits faulty channel.
In event-monitoring and chain control module, pre-set at most 16 chain event faults, each chain event fault comprises the simulated conditions of event fault, digital condition and the chain state of relay; Its chain event failure code is from 0 to 15;
Simulated conditions are specially: realize the setting of simulating signal transmission channels by channel setting, its channel number is 0 to 31; Carry out setting voltage maximal value by upper limit setting; Carry out setting voltage minimum value by lower limit setting; By the mode that arranges in boundary out-of-bounds to judge that fault condition occurs; By chain event failure code, event of failure mark is set;
Numeral condition is specially: the transmission IO passage of digital signal is set by mask word, and 0 represents shielding, and 1 represents to choose, and value is 0 to FFFF; Specify to choose the significant level of IO passage by control word, 0 represents low level, and 1 represents high level; By logical relation, selection logic is set, when selection or logic, in the IO channel data reading in or relay status, has any one state to meet control word regulation, represent that chain event fault occurs; While selecting with logic, the IO channel data reading in and relay status all meet control word regulation, just represent that event of failure occurs;
The chain state of relay is used for arranging the chain event control condition of relay, is specially:
When chain relay status chain event fault be set occur after corresponding relay status, its most-significant byte is mask word, 1 represent chain event fault occur after relay status constant, 0 represent chain event fault occur after relay status change; Least-significant byte is control word, and 1 represents relay closes, and 0 represents that relay disconnects;
By chain event fault is set time delay, occur the time that rear relay maintains the original state, after postponing time delay, corresponding relay just carries out corresponding actions;
The chain operation of relay is set by enabled state, and when enabled state is effective, corresponding chain event is carried out chain operation, otherwise, do not carry out chain operation.
The chain state of relay divides three types: the chain state of a control of analog input amount, the chain state of a control of digital input amount and analog input amount and digital input amount be chain state of a control simultaneously,
When the chain state of a control of analog input amount, the digital condition mask word in chain event fault is made as 0;
When the chain state of a control of digital input amount, the be made as+10V of the simulated conditions upper limit in chain event fault, be made as-10V of lower limit, out-of-bounds arranges in boundary and selects in boundary;
Analog input amount and digital input amount be chain state of a control simultaneously: self-defined simulated conditions and digital condition on request;
After the chain state of above-mentioned relay has been set, the event of specifying is enabled, complete the parameter setting of the chain state of relay.
Advantage of the present invention: analog and digital signal collection of the present invention and chain control device can be sampled to outside simulating signal and digital signal, and possess and report to the police and chain control function, can be used in industrial control system or Auto-Test System, realize supervision and the operation of external unit duty and control, there is wide range of application and very high promotional value.
Aspect hardware setting, apparatus of the present invention have that 32 tunnels are single-ended, 16 bit resolutions, input range are-analog input channel of 10V-+10V, passage scanning sequence can be selected arbitrarily, and sampling rate is adjustable; There are 16 railway digital input channels, can complete collection and the Control of 16 railway digital signals; There are No. 8 relays, can realize and provide break-make control function to outside; There is USB interface, image data can be passed to computing machine, accept control strategy that user configures on computers etc.
Hardware configuration of the present invention can work alone, and now can be used as data acquisition and relay switch equipment and uses; The more important thing is, under the support of upper computer software, it can also realize the chain control function to outside, pilot relay closed or the disconnect when state that monitors simulating signal and digital signal meets certain condition, controls it according to the state of external unit signal thereby realize.User in use, can pass through the self-defined chain controlled condition of upper computer software, closed or the disconnection of corresponding certain the road relay of certain state of for example certain road simulating signal or digital signal, and it is passed to external unit by USB interface, when working alone, apparatus of the present invention can monitor external analog signal or digital signal, while meeting chain controlled condition, by relay, external unit is carried out to chain control.
Brief description of the drawings
Fig. 1 is the theory diagram of analog and digital signal collection of the present invention and chain control device;
Fig. 2 is the theory diagram of analogue signal acquisition circuit;
Fig. 3 is the theory diagram of digital signal acquiring circuit;
Fig. 4 is the theory diagram of relay unit;
Fig. 5 is the software composition frame chart of host computer;
Fig. 6 is the fundamental diagram of event-monitoring and chain control module;
Fig. 7 is the fundamental diagram of digital signal processor;
Fig. 8 is the workflow diagram of digital signal processor;
Fig. 9 is chain control flow chart of the present invention.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, analog and digital signal collection and chain control device described in present embodiment, the signal that it is exported for gathering external unit 1, the signal that this external unit 1 is exported comprises simulating signal and digital signal, it comprises analogue signal acquisition circuit 3, digital signal acquiring circuit 4, relay unit 5 and digital signal processor 6
Analogue signal acquisition circuit 3 provides 32 road collection of simulant signal abilities, for gather the simulating signal that external unit 1 exports and it is processed after send digital signal processor 6 to;
Digital signal acquiring circuit 4 provides 16 railway digital signals collecting abilities, for gather the digital signal that external unit 1 exports and it is processed after send digital signal processor 6 to;
Digital signal processor 6 judges the current state of external unit 1 according to the signal receiving, and exports control signal to relay unit 5, and relay unit 5 carries out switch control by maximum No. 8 relays to external unit 1 according to the control signal receiving;
Digital signal processor 6 gathers the relay status signal of relay unit 5 simultaneously.
Analog and digital signal collection described in present embodiment and chain control device can gather simulating signal and the digital signal that external unit 1 is exported, and according to user's actual demand, external device parameters and chain condition are defined, realize the chain control to external unit.
In present embodiment, use the overall control of digital signal processor 6 implement devices.
Embodiment two: below in conjunction with Fig. 1, present embodiment is described, present embodiment is described further embodiment one, present embodiment also comprises USB interface 7 and host computer 2,
Host computer 2 carries out the transmission of data and command signal by USB interface 7 and digital signal processor 6.
Embodiment three: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, present embodiment is described further embodiment one or two, described in present embodiment, analogue signal acquisition circuit 3 is made up of analog multichannel switch circuit 3-1, operational amplifier 3-2 and A/D convertor circuit 3-3
Analog multichannel switch circuit 3-1 is for gathering simulating signal the leading up to after operational amplifier 3-2 multichannel analog signals that external unit 1 is exported, switch to A/D convertor circuit 3-3, the digital signal of A/D convertor circuit 3-3 output sends digital signal processor 6 to.
In present embodiment, analog multichannel switch circuit 3-1 selects MAX307 chip to realize, and the wherein a certain road that it can Jiang32 road simulating signal switches to A/D convertor circuit.Operational amplifier 3-2 adopts AD620 chip; A/D convertor circuit 3-3 adopts AD976 chip.
Embodiment four: present embodiment is described below in conjunction with Fig. 1 and Fig. 3, present embodiment is described further embodiment one, two or three, described in present embodiment, digital signal acquiring circuit 4 is made up of photoelectrical coupler 4-1 and digital signal impact damper 4-2
The digital signal that external unit 1 is exported, after photoelectrical coupler 4-1 isolation, then sends digital signal processor 6 to through digital signal impact damper 4-2.
Photoelectrical coupler 4-1 adopts TLP521-4 chip, and digital signal impact damper 4-2 adopts 74F540 chip.
Embodiment five: present embodiment is described below in conjunction with Fig. 1 and Fig. 4, present embodiment is described further embodiment one, two, three or four, described in present embodiment, relay unit 5 is made up of latch 5-1, driver 5-2, multicircuit relay 5-3 and relay status signal buffer 5-4
Multicircuit relay 5-3 comprises maximum No. 8 relays;
Digital signal processor 6 according to receive signal the current state of external unit 1 is judged, output control signal after latch 5-1 and driver 5-2 give multicircuit relay 5-3, by multicircuit relay 5-3, external unit 1 is carried out to switch control;
Relay status signal buffer 5-4 is used for receiving the relay status signal of multicircuit relay 5-3, and passes to digital signal processor 6.
Latch 5-1 adopts 74HC574 chip, and driver 5-2 adopts ULN2803A chip, and relay 5-3 adopts G6S-2 type dpdt double-pole double-throw (DPDT) type relay.
Embodiment six: present embodiment is described below in conjunction with Fig. 1 and Fig. 5, present embodiment is described further embodiment two, three, four or five, described in present embodiment, host computer 2 is for completing monitoring and the chain control to external unit 1 state by digital signal processor 6, and the simulating signal and the digital signal that gather are shown to described monitoring and specifically realizing with lower module by host computer 2 of chain control to external unit 1 state:
Simulating signal is read in module 2-1, digital signal and is read in module 2-2, multicircuit relay control module 2-3, analog input channel parameter and arrange that module 2-4, digital input channel parameter arrange module 2-5, chain alarm parameters arranges module 2-6 and event-monitoring and chain control module 2-7
Simulating signal is read in module 2-1 for realizing reading of simulating signal to digital signal processor 6;
Digital signal is read in module 2-2 for realizing reading of digital signal to digital signal processor 6;
Multicircuit relay control module 2-3, for according to the simulating signal and the digital signal that read, the state of multicircuit relay 5-3 being controlled, realizes the control to external unit 1 then;
Analog input channel parameter arranges module 2-4 for realizing the setting to simulating signal input channel parameter;
Digital input channel parameter arranges module 2-5 for realizing the setting to digital signal input channel parameter;
Chain alarm parameters arranges module 2-6 for realizing in the time pre-seting chain condition generation, the setting of alarm parameters;
Event-monitoring and chain control module 2-7 are for realizing the control to external unit 1 output signal and the chain event of relay switch state, it indicates the generation of the chain event fault of external unit 1 by pilot lamp, and obtain current chain event failure code according to the corresponding chain event fault label pre-seting, then determine that according to current chain event failure code the signal of external unit 1 transmits faulty channel.
In present embodiment, by the correlation parameter of host computer 2 software self-defining devices, the supervision that simultaneously upper computer software also can finishing equipment state, the demonstration of image data etc.In host computer, also can monitor by the interface corresponding with each module the generation state of defined event.In the time that the pilot lamp of " event generation " reddens, illustrate that now the state of certain event does not conform to specified states, can read the code of this event by " reading the label of the event that occurs " button, select after event code, the digital state that can read respectively current event by " reading event number word state " and " reading event simulation state " button and this event specify the analogue value of analog channel.
Embodiment seven: present embodiment is described below in conjunction with Fig. 1 and Fig. 6, present embodiment is described further embodiment six, described in present embodiment, in event-monitoring and chain control module 2-7, pre-set at most 16 chain event faults, each chain event fault comprises the simulated conditions of event fault, digital condition and the chain state of relay; Its chain event failure code is from 0 to 15;
Simulated conditions are specially: realize the setting of simulating signal transmission channels by channel setting, its channel number is 0 to 31; Carry out setting voltage maximal value by upper limit setting; Carry out setting voltage minimum value by lower limit setting; By the mode that arranges in boundary out-of-bounds to judge that fault condition occurs; By chain event failure code, event of failure mark is set;
Numeral condition is specially: the transmission IO passage of digital signal is set by mask word, and 0 represents shielding, and 1 represents to choose, and value is 0 to FFFF; Specify to choose the significant level of IO passage by control word, 0 represents low level, and 1 represents high level; By logical relation, selection logic is set, when selection or logic, in the IO channel data reading in or relay status, has any one state to meet control word regulation, represent that chain event fault occurs; While selecting with logic, the IO channel data reading in and relay status all meet control word regulation, just represent that event of failure occurs;
The chain state of relay is used for arranging the chain event control condition of relay, is specially:
When chain relay status chain event fault be set occur after corresponding relay status, its most-significant byte is mask word, 1 represent chain event fault occur after relay status constant, 0 represent chain event fault occur after relay status change; Least-significant byte is control word, and 1 represents relay closes, and 0 represents that relay disconnects;
By chain event fault is set time delay, occur the time that rear relay maintains the original state, after postponing time delay, corresponding relay just carries out corresponding actions;
The chain operation of relay is set by enabled state, and when enabled state is effective, corresponding chain event is carried out chain operation, otherwise, do not carry out chain operation.
In present embodiment, software interface can be set in host computer and realize the chain controlled condition of customized event, can also be by self-defined other operational factor that equipment is set of software interface.
In numeral condition, mask word is used for selecting the IO passage working.
Embodiment eight: present embodiment is described below in conjunction with Fig. 7 to Fig. 9, present embodiment is described further embodiment seven, described in present embodiment, the chain state of relay divides three types: the chain state of a control of analog input amount, the chain state of a control of digital input amount and analog input amount and digital input amount be chain state of a control simultaneously
When the chain state of a control of analog input amount, the digital condition mask word in chain event fault is made as 0;
When the chain state of a control of digital input amount, the be made as+10V of the simulated conditions upper limit in chain event fault, be made as-10V of lower limit, out-of-bounds arranges in boundary and selects in boundary;
Analog input amount and digital input amount be chain state of a control simultaneously: self-defined simulated conditions and digital condition on request;
After the chain state of above-mentioned relay has been set, the event of specifying is enabled, complete the parameter setting of the chain state of relay.
When the chain state of a control of analog input amount, the digital condition mask word in chain event fault is made as to 0, by 16 all shieldings of railway digital input, simulated conditions are self-defined setting on request.
When the chain state of a control of digital input amount, digital condition is self-defined setting on request.Because equipment simulating input range is-10V～+ 10V, be therefore made as+10V of the upper limit of simulated conditions, be made as-10V of lower limit, while selecting " in boundary ", simulated conditions do not have practical function simultaneously.
The present invention completes the control to the integral device course of work by digital signal processor DSP.As shown in Figure 7, DSP internal processes can be divided into two parts: a part is and upper machine communication part, for being connected of finishing equipment and host computer, accept order and the parameter of host computer, complete equipment is carried out to self-defined setting, simultaneously can be to host computer transmission information, make host computer possess the function of demonstration result and the event of supervision; Other one is equipment control section, for completing initialization, reset, data acquisition, carrying out the functions such as chain control.
Apparatus of the present invention start after data acquisition and control work, carry out analog data acquisition and digital data acquisition under the control of DSP, and complete and on equipment, store the functions such as data.Meanwhile, DSP, by data collection result and user are imposed a condition and compared, determines whether and carries out chain control and other operations.As shown in Figure 8.
While using the chain control function of the present invention, first need to be connected with host computer by USB, by simulated conditions and the digital condition of host computer softpanel customized event, event condition is stored in DSP by dsp software program.After image data, data collection result is judged, in the time that data acquisition result does not meet event condition, do not carry out chain control; In the time that data acquisition result meets event condition, then judge whether this event is enabled, if event is enabled, require to carry out chain control according to event, if event is not enabled, event is not carried out chain control.As shown in Figure 9.
Claims (8)
1. an analog and digital signal collection and chain control device, it is for gathering the signal of external unit (1) output, the signal of this external unit (1) output comprises simulating signal and digital signal, it is characterized in that, it comprises analogue signal acquisition circuit (3), digital signal acquiring circuit (4), relay unit (5) and digital signal processor (6)
Analogue signal acquisition circuit (3) provides 32 road collection of simulant signal abilities, for gather the simulating signal of external unit (1) output and it is processed after send digital signal processor (6) to;
Digital signal acquiring circuit (4) provides 16 railway digital signals collecting abilities, for gather the digital signal of external unit (1) output and it is processed after send digital signal processor (6) to;
Digital signal processor (6) judges the current state of external unit (1) according to the signal receiving, output control signal is to relay unit (5), and relay unit (5) carries out switch control by maximum No. 8 relays to external unit (1) according to the control signal receiving;
Digital signal processor (6) gathers the relay status signal of relay unit (5) simultaneously.
2. analog and digital signal collection according to claim 1 and chain control device, is characterized in that, it also comprises USB interface (7) and host computer (2),
Host computer (2) carries out the transmission of data and command signal by USB interface (7) and digital signal processor (6).
3. analog and digital signal collection according to claim 1 and 2 and chain control device, it is characterized in that, analogue signal acquisition circuit (3) is made up of analog multichannel switch circuit (3-1), operational amplifier (3-2) and A/D convertor circuit (3-3)
Analog multichannel switch circuit (3-1) is for gathering simulating signal the leading up to after operational amplifier (3-2) multichannel analog signals of external unit (1) output, switch to A/D convertor circuit (3-3), the digital signal of A/D convertor circuit (3-3) output sends digital signal processor (6) to.
4. analog and digital signal collection according to claim 3 and chain control device, is characterized in that, digital signal acquiring circuit (4) is made up of photoelectrical coupler (4-1) and digital signal impact damper (4-2),
The digital signal of external unit (1) output, after photoelectrical coupler (4-1) isolation, then sends digital signal processor (6) to through digital signal impact damper (4-2).
5. analog and digital signal collection according to claim 4 and chain control device, it is characterized in that, relay unit (5) is made up of latch (5-1), driver (5-2), multicircuit relay (5-3) and relay status signal buffer (5-4)
Multicircuit relay (5-3) comprises maximum No. 8 relays;
Digital signal processor (6) judges the current state of external unit (1) according to the signal receiving, output control signal is given multicircuit relay (5-3) after latch (5-1) and driver (5-2), by multicircuit relay (5-3), external unit (1) is carried out to switch control;
Relay status signal buffer (5-4) is for receiving the relay status signal of multicircuit relay (5-3), and passes to digital signal processor (6).
6. analog and digital signal collection according to claim 5 and chain control device, it is characterized in that, host computer (2) is for completing monitoring and the chain control to external unit (1) state by digital signal processor (6), and the simulating signal and the digital signal that gather are shown to described monitoring and specifically realizing with lower module by host computer (2) of chain control to external unit (1) state:
Simulating signal is read in module (2-1), digital signal and is read in module (2-2), multicircuit relay control module (2-3), analog input channel parameter and arrange that module (2-4), digital input channel parameter arrange module (2-5), chain alarm parameters arranges module (2-6) and event-monitoring and chain control module (2-7)
Simulating signal is read in reading of module (2-1) simulating signal to digital signal processor (6) for realization;
Digital signal is read in reading of module (2-2) digital signal to digital signal processor (6) for realization;
Multicircuit relay control module (2-3), for according to the simulating signal and the digital signal that read, the state of multicircuit relay (5-3) being controlled, realizes the control to external unit (1) then;
Analog input channel parameter arranges module (2-4) for realizing the setting to simulating signal input channel parameter;
Digital input channel parameter arranges module (2-5) for realizing the setting to digital signal input channel parameter;
Chain alarm parameters arranges module (2-6) for realizing in the time pre-seting chain condition generation, the setting of alarm parameters;
Event-monitoring and chain control module (2-7) are for realizing the control to external unit (1) output signal and the chain event of relay switch state, it indicates the generation of the chain event fault of external unit (1) by pilot lamp, and obtain current chain event failure code according to the corresponding chain event fault label pre-seting, then determine that according to current chain event failure code the signal of external unit (1) transmits faulty channel.
7. analog and digital signal collection according to claim 6 and chain control device, it is characterized in that, in event-monitoring and chain control module (2-7), pre-set at most 16 chain event faults, each chain event fault comprises the simulated conditions of event fault, digital condition and the chain state of relay; Its chain event failure code is from 0 to 15;
Simulated conditions are specially: realize the setting of simulating signal transmission channels by channel setting, its channel number is 0 to 31; Carry out setting voltage maximal value by upper limit setting; Carry out setting voltage minimum value by lower limit setting; By the mode that arranges in boundary out-of-bounds to judge that fault condition occurs; By chain event failure code, event of failure mark is set;
Numeral condition is specially: the transmission IO passage of digital signal is set by mask word, and 0 represents shielding, and 1 represents to choose, and value is 0 to FFFF; Specify to choose the significant level of IO passage by control word, 0 represents low level, and 1 represents high level; By logical relation, selection logic is set, when selection or logic, in the IO channel data reading in or relay status, has any one state to meet control word regulation, represent that chain event fault occurs; While selecting with logic, the IO channel data reading in and relay status all meet control word regulation, just represent that event of failure occurs;
The chain state of relay is used for arranging the chain event control condition of relay, is specially:
When chain relay status chain event fault be set occur after corresponding relay status, its most-significant byte is mask word, 1 represent chain event fault occur after relay status constant, 0 represent chain event fault occur after relay status change; Least-significant byte is control word, and 1 represents relay closes, and 0 represents that relay disconnects;
By chain event fault is set time delay, occur the time that rear relay maintains the original state, after postponing time delay, corresponding relay just carries out corresponding actions;
The chain operation of relay is set by enabled state, and when enabled state is effective, corresponding chain event is carried out chain operation, otherwise, do not carry out chain operation.
8. analog and digital signal collection according to claim 7 and chain control device, it is characterized in that, the chain state of relay divides three types: the chain state of a control of analog input amount, the chain state of a control of digital input amount and analog input amount and digital input amount be chain state of a control simultaneously
When the chain state of a control of analog input amount, the digital condition mask word in chain event fault is made as 0;
When the chain state of a control of digital input amount, the be made as+10V of the simulated conditions upper limit in chain event fault, be made as-10V of lower limit, out-of-bounds arranges in boundary and selects in boundary;
Analog input amount and digital input amount be chain state of a control simultaneously: self-defined simulated conditions and digital condition on request;
After the chain state of above-mentioned relay has been set, the event of specifying is enabled, complete the parameter setting of the chain state of relay.
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